up to you but i'd wait a week or two for the untethered jb to be released.
I know but you can download a 4.2.1 iphone 4 bundle for it to work. I already made the custom 4.2.1 firmware, just making sure its ok to use it without upgrading baseband
Pwnage hasnt been updated yet to create custom 4.2.1 IPSW's.
The only way you can JB 4.2.1 is Redsnow and that doesnt preserve your baseband.
I heard if you update while running Tinyumbrella's TSS sever in the back you can preserve your unlockable baseband. But remember, Update dont click restore.
You will have to kick device out of recovery once its done and gives you an error message.
Up to you but I'd wait a week or two for the untethered JB to be released.
im getting an error 21 in itunes when I try doing that tinyumbrella method. I press update and then gives me that error without even updating it. strange
Interesting.
It doesnt go thru the update process at all?
You try kicking it out of recovery with TU?
it says extracting software and makes couple noises but comes with an error 21. Then I have to kick it out of recovery for it to go back to 4.01. Updated new itunes but still nothing
Damn, there was a few people swearing up and down that it does work but I havent tested it out myself.
Let me go look for that thread.
http://www.iphone4jailbreak.org/how-to-upgrade-ios-4-2-1-preserving-baseband.html
https://forums.macrumors.com/threads/1059740/
Interesting.
I didnt think it would work in the first place but there's some that claim they have done it.
Weird...
and surprised i cant find anyone trying the 4.2.1 bundle in pwangetool to preserve baseband. I would think that would work fine but would like to get some verification